文献类型：期刊文献

中文题名：基于“源-汇”景观的太湖宜兴段入湖港口水质时空变化

英文题名：Spatiotemporal characteristics of water quality in Taihu Lake watershed based on ‘source-sink’ landscape change

作者：王瑛[1] 张建锋[1] 陈光才[1] 徐永辉[2] 陈云[2] 刘永庆[1,3]

第一作者：王瑛

机构：[1]中国林业科学研究院亚热带林业研究所;[2]宜兴市农林局;[3]浙江大学农业与生物技术学院

年份：2012

卷号：31

期号：2

起止页码：399-405

中文期刊名：生态学杂志

外文期刊名：Chinese Journal of Ecology

收录：CSTPCD;;Scopus;北大核心:【北大核心2011】；CSCD:【CSCD2011_2012】；

基金：林业公益性行业科研专项(201104055);江苏省科技项目(BE2009603和BE2008636)资助

语种：中文

中文关键词：太湖;“源-汇”景观生态;景观对比指数;综合水质标识指数

外文关键词：Taihu Lake; source-sink landscape ecology; landscape contrast index （LCI）; comprehensive water quality identification index

分类号：P901

摘要：针对太湖流域非点源污染日益严重和近年来宜兴段土地利用方式变化状况,以太湖大堤西岸3km缓冲区内的景观为研究区域,基于"源-汇"景观理论,计算了其"源-汇"景观空间负荷对比指数(LCI),并结合宜兴市10条主要入太湖港口的实测水质数据,定量分析了太湖流域宜兴段非点源污染的时空变化特征。结果表明:时间上,2010年有8个入湖港口的LCI值较2004年有明显下降;对应的水质指标方面,铵氮浓度降低了41.0%,说明LCI降低对氨氮浓度影响较大,而其他水质指标改善不明显。空间上,景观类型通过相对重要性指数变化对LCI值产生相应影响,而LCI值与综合水质标识指数之间呈正相关关系,说明景观空间格局变化会显著影响水质指标。总之,LCI值与水质指标中的铵氮和总氮密切相关,LCI值的变化趋势与各港口水质的时空变化趋势基本一致,LCI能够较好地反映非点源污染的产生、转移过程。
Aiming at the increasing worsening of non-point source pollution and the great change of land use pattern in Taihu Lake watershed, this paper studied the spatiotemporal variation of non-point source pollution in an area of the watershed based on source-sink landscape change. The test area was located in the 3 km buffer zone of Dati west bank of Taihu Lake, and 10 main channels in Yixing City connected with Taihu Lake were selected as the sampling plots. The source-sink location-weighted landscape contrast index （LCI） of these channels was calculated based on source-sink landscape theory, in addition to water sample collection and water quality analysis. Temporally, the LCI of 8 of the 10 channels had an obvious decrease in 2010, as compared with that in 2004. Correspondingly, a main indicator of water quality, NH＋4-N content, was decreased by 41.0%. The other parameters had no significant change. Spatially, the LCI was mainly affected by landscape pattern, and positively correlated with the comprehensive water quality identification index. Our results implied that the spatial change of the landscape pattern in the channels connected with Taihu Lake could obviously affect water quality. In sum, the LCI was closely correlated with the water quality indicators NH＋4-N and total N, the variation trend of the LCI was in accordance with that of the water quality, and the source-sink LCI could better reflect the generation and translocation of non-point source pollution.